Replace distributor deferred list, with a simple for loop until I understand why the former breaks and the latter doesn't

Have all unit tests import from our own subclass of trial's unittest TestCase; set up logging in ONE PLACE ONLY

fix the copyright holder from matrix.org to OpenMarket Ltd, as matrix.org hasn't been incorporated in time for launch.

add in copyrights to everything, not just the synapse subdir, and add a copyrighter.pl whilst we're at it